1mvh
From Proteopedia
structure of the SET domain histone lysine methyltransferase Clr4
Overview
Methylation of histone H3 lysine 9 is an important component of the 'histone code' for heterochromatic gene silencing. The SET domain-containing Clr4 protein, a close relative of Su(var)3-9 proteins in higher eukaryotes, specifically methylates lysine 9 of histone H3 and is essential for silencing in Schizosaccharomyces pombe. Here we report the 2.3 A resolution crystal structure of the catalytic domain of Clr4. The structure reveals an overall fold rich in beta-strands, a potential active site consisting of a SAM-binding pocket, and a connected groove that could accommodate the binding of the N-terminal tail of histone H3. The pre-SET motif contains a triangular zinc cluster coordinated by nine cysteines distant from the active site, whereas the post-SET region is largely flexible but proximal to the active site. The structure provides insights into the architecture of SET domain histone methyltransferases and establishes a paradigm for further characterization of the Clr4 family of epigenetic regulators.
About this Structure
1MVH is a Single protein structure of sequence from Schizosaccharomyces pombe. Full crystallographic information is available from OCA.
Reference
Structure of the SET domain histone lysine methyltransferase Clr4., Min J, Zhang X, Cheng X, Grewal SI, Xu RM, Nat Struct Biol. 2002 Nov;9(11):828-32. PMID:12389037 Page seeded by OCA on Sat May 3 01:46:03 2008
